//
//  Truck.m
//  08-IOS9新特性(Nullability,泛型,_kindof)
//
//  Created by dllo on 16/7/13.
//  Copyright © 2016年 dllo. All rights reserved.
//

#import "Truck.h"

@implementation Truck
- (void)addObject:(id)object {
    return;
}
- (id)anyObject {

    return nil;
}
// 方法的返回值,是一个不可变数组/可变
- (__kindof
   NSArray *)returnArray {
    return [NSMutableArray array];
}

@end
